{
  "manageEntity": {
    "action": "Save",
    "entityId": "1624354034",
    "entityType": "Track",
    "nonce": "0xcd770da3a15a1e9f8afb83c6db651483a5d1700e8d8024ab2f475c69fbf9f6a4",
    "signature": "0xdb17e0a1e670c7305624bf9a0f27b332fd8e2b8998dcaa90494a6041cd09cd9818572072be992f28052b4caa196708d42d34fc0ccca307654c36494f1131184c1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}